Description
This AR-15 Steel Castle Nut provides a robust mechanical interface between the lower receiver and the buffer tube assembly. Constructed from steel with a Parkerized finish, it offers durable corrosion resistance and reliable performance in demanding environments. The solid pattern design ensures consistent structural integrity, while the precision-staked points engage securely with the buffer tube to prevent rotation and maintain proper alignment.
Designed for compatibility with both Mil-Spec and commercial Buffer Tube, this component fits standard AR-15 lower receivers without modification. The inner concentric ridges facilitate a tight friction fit, while the outer notches allow for proper staking during assembly. Being made in the USA, it meets domestic manufacturing standards for quality control and material consistency.
Key specifications include a steel construction, Parkerized finish, and solid pattern geometry. It is engineered to lock the buffer tube firmly onto the lower receiver, ensuring the buffer system remains stable during operation. This castle nut is an essential component for builders requiring a reliable, high-strength fastening solution for their AR-15 platform.





Carl Multon –
its a castle nut…not cheap or painted so Im happy. Fastest shipping with these guys online